Short-term investments (Tables)

12 Months Ended

Dec. 31, 2018

Short-term investments

Schedule of short-term investments

	As of December 31, 2018
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Short-term investments:
Available-for-sale securities	$	50	$	—	$	—	$	50
Term deposits		175		—		—		175
Total	$	225	$	—	$	—	$	225

	As of December 31, 2017
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
Short-term investments:
Available-for-sale securities	$	76	$	—	$	(26)	$	50
Term deposits		60		—		—		60
Total	$	136	$	—	$	(26)	$	110